Chair tilt mechanism



FIG. 1 is a perspective view of a chair tilt mechanism showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in FIGS. 6 and 7 are for illustrative purposes only and do not form part of the claimed design. 

I claim the ornamental design for a chair tilt mechanism, as shown and described. 